Carbon Embedding of Pt Cluster Superlattices Templated by Hexagonal Boron Nitride on Ir(111)

Abstract

With the goal to delevop the fabrication of a new type of Pt-nanoparticle carbon–support electrocatalyst, we investigate the carbon embedding of Pt cluster superlattices grown on the moiré of a monolayer of hexagonal boron nitride (h-BN) on Ir(111). Our combined scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) study establishes conformal C embedding of the Pt clusters on h-BN/Ir(111) without deterioration of superlattice order, preferential and strong binding of the embedding carbon to the Pt clusters, and upon annealing the formation of a homogeneous amorphous carbon (a-C) matrix. There are indications that while the a-C matrix and the Pt clusters bind strongly to each other, upon annealing both weaken their binding to h-BN.

Self-Assemblies and Properties of Side-On Picene Strips on a Monolayered CuO Film

“…In previous STM studies, the aromatic hydrocarbons are inevitably entangled by a conducting substrate owing to the orbital hybridization and molecule–substrate charge transfer, preventing their intrinsic stacking structures from being constructed. One promising regulation strategy is to electronically lift them with a buffering layer such as sodium chloride, − graphene, or other ultrathin films. − …”